The castle and grounds from the air. Completed in 1806 by London-based architect Joseph Bonomi, this neo-classical mansion replaced a castle burnt down in 1802. It was used as a military hospital during the First World War and was home to Queen Victoria's daughter Princess Louise, the Dowager Duchess of Argyll, until her death in 1939. It was an HQ for the Rosneath Naval Base in World War Two, then abandoned, then damaged by fire in 1947, and demolished in 1961. Image date unknown.